In:
The Astrophysical Journal, American Astronomical Society, Vol. 928, No. 2 ( 2022-04-01), p. 179-
Abstract:
With Σ SFR ∼ 4200 M ⊙ yr −1 kpc −2 , SPT 0346–52 ( z = 5.7) is the most intensely star-forming galaxy discovered by the South Pole Telescope. In this paper, we expand on previous spatially resolved studies, using ALMA observations of dust continuum, [N ii ] 205 μ m, [C ii ] 158 μ m, [O i ] 146 μ m, and undetected [N ii ] 122 μ m and [O i ] 63 μ m emission to study the multiphase interstellar medium (ISM) in SPT 0346–52. We use pixelated, visibility-based lens modeling to reconstruct the source-plane emission. We also model the source-plane emission using the photoionization code cloudy and find a supersolar metallicity system. We calculate T dust = 48.3 K and λ peak = 80 μ m and see line deficits in all five lines. The ionized gas is less dense than comparable galaxies, with n e 〈 32 cm −3 , while ∼20% of the [C ii ] 158 μ m emission originates from the ionized phase of the ISM. We also calculate the masses of several phases of the ISM. We find that molecular gas dominates the mass of the ISM in SPT 0346–52, with the molecular gas mass ∼4× higher than the neutral atomic gas mass and ∼100× higher than the ionized gas mass.
Type of Medium:
Online Resource
ISSN:
0004-637X
,
1538-4357
DOI:
10.3847/1538-4357/ac58f9
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2022
detail.hit.zdb_id:
2207648-7
detail.hit.zdb_id:
1473835-1
SSG:
16,12
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